Home Math riddle for you: How Many Kids Are In The Family?

# Math riddle for you: How Many Kids Are In The Family?

A family, made up of 2 parents with children, has an average age of 20. If you exclude 1 parent, who is 40, the average age drops to 15. How many kids are in the family? How Many Kids Are In The Family?

A

N

S

W

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R

Let S be the sum of the ages of all the members in the family &
Let C be the number of children.

Hence from the 1st ser of information we can write;
S/(C + 2) = 20
i.e. S = 20(C + 2)
Hence;
S = 20C + 40 —

From the second set of information we can write
(S – 40)/ (C + 1) = 15
i.e. S – 40 = 15(C + 1)
S – 40 = 15C + 15
Therefore;
S = 15C + 55 —–

Therefore, from  &  we get;
S = 20C + 40 = 15C + 55
20C + 40 = 15C + 55
5C = 15
Therefore;
C = 3

Answer: Number of children = 3

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## Crazy Riddles That Will Put Your Logic To Test. Can you solve this?

The human brain is the real controller of your body and to keep it working you need constant exercise. These puzzles will keep your brain in good shape.

It is known for ages that the brain is the controller of the body. In any case, to keep the controller working we have to experience continuous exercises. There are numerous ways where one can prepare the mind and increase its productivity. Again, ensure you cover every part of the question and after that answer. There is something that girls have 5, but cows have just 4

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